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SMBus Dual/Quad Current Monitor

Accurate Current Measurement with Automatic Overcurrent Shutdown for Four Supply Rails

Product Details

Key Features

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 10
VOS @25°C (µV) (max) 191
Output Format Digital
CMVR (V) (min) 2.5
CMVR (V) (max) 13.2
VCC (V) (min) 2.7
VCC (V) (max) 3.6
ICC (µA) (typ) 830
Bi-Dir. Curr. Sense No
Gain Accuracy @25°C (%) (max) 2
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.17
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Simplified Block Diagram

Technical Docs

Data Sheet SMBus Dual/Quad Current Monitor Jan 22, 2015

Support & Training

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Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.

Parameters

Parametric specs for Current Sense Amplifiers
VSENSE_FS (mV) (recomm.) 10
VOS @25°C (µV) (max) 191
Output Format Digital
CMVR (V) (min) 2.5
CMVR (V) (max) 13.2
VCC (V) (min) 2.7
VCC (V) (max) 3.6
ICC (µA) (typ) 830
Bi-Dir. Curr. Sense No
Gain Accuracy @25°C (%) (max) 2
Oper. Temp. (°C) -40 to +85
Package/Pins TQFN/16
Budgetary
Price (See Notes)
3.17

Key Features

  • Enables Accurate Current Consumption Measurement on Up to Four Rails with Digital Serial Readout
    • Low 12.25mV Full-Scale Current-Sense Voltage
    • Automatic Round Robin Sequencing to Sample Each Current-Sense Input
    • Selectable Averaging to Improve Current-Sense Accuracy
    • Programmable Digital Overcurrent Thresholds with Delay Function
    • I2C/SMBus Interface with Bus Timeout
    • Register Access to Real-Time Current Measurements
  • Compatible on a Wide Range of Voltage Rails
    • Wide 2.5V to 13.2V Common-Mode Range
  • Automatic System Shutdown on Overcurrent Condition
    • Shutdown Output Provides Immediate Hardware Indication of Overcurrent

Applications/Uses

  • Base Stations
  • Industrial Controls
  • Network Switches and Routers
  • Servers
  • Smart Grid Network Systems

Description

The MAX34408 and MAX34409 are two- and four-channel current monitors that are configured and monitored with a standard I2C/SMBus serial interface. Each unidirectional current sensor offers precision high-side operation with a low full-scale sense voltage. The devices automatically sequence through two or four channels and collect the current-sense samples and average them to reduce the effect of impulse noise. The raw ADC samples are compared to user-programmable digital thresholds to indicate overcurrent conditions. Overcurrent conditions trigger a hardware output to provide an immediate indication to shut down any necessary external circuitry.

Simplified Block Diagram

MAX34408, MAX34409: Typical Application Circuit and Block Diagram MAX34408, MAX34409: Typical Application Circuit and Block Diagram Zoom icon

Technical Docs

Data Sheet SMBus Dual/Quad Current Monitor Jan 22, 2015

Support & Training

Search our knowledge base for answers to your technical questions.

Filtered Search

Our dedicated team of Applications Engineers are also available to answer your technical questions. Visit our support portal .

Sampling:
Selecting the Sample button above will redirect to the third-party ADI Sample Site. The part selected will carry over to your cart on this site once logged in. Please create a new account there if you have never used the site before. Contact SampleSupport@analog.com with any questions regarding this Sample Site.